1)
Herbert P. Ginsburg. (1997). Entering the child's mind : the clinical interview in psychological research and practice, Cambridge: Cambridge University Press.

2)
Duveen, G. (2000). Piaget Ethnographer. Social Science Information, 39, 79-97.

3)
Smith, L. (1992) Judgements and Justifications: Criteria for the attribution of children's knowledge in Piagetian research. British Journal of Developmental Psychology, 10, 1-23.

4)
Wood, D. (1988) How Children Think and Learn. Oxford: Blackwell.

5)
in French:
- Vinh-Bang (1966). Le m¨¦thode clinique et la recherche en psychologie de l'enfant. In Psychologie et ¨¦pist¨¦mologie g¨¦n¨¦tique: th¨¨mes piag¨¦tiens. Paris: Dunod.

6)
in French, the introduction of:
- Inhelder, B., Sinclair, H., & Bovet, M. (1974). Apprentissage et structures de la connaissance. Paris: P.U.F.

7)
in English (especially pp. 15-21):
- Voyat, G.E. (1982). Piaget systematized. Hillsdale, N.J.: Lawrence Erlbaum.